Locomotive arch



Sept. 18 ,,1923. 1,468,308

c. E. MILLER LOCOMOTIVE ARCH Fiied Feb. '2, 1925 Patented Sept. 18, 1923.

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Application filedIFebruary 7,1923. Serial No. (i17,489.

To all whom it may concern:

Be it known that I, CHARLES MILLER, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have. invented certain new and useful Improvements in a Locomotive Arch, of which the following is-a specification. 7 My invention relates to baliiing devicesfor locomotives and particularly to a novel side brick construction. I

It has been common in the art to provide a plurality of longitudinally extending in clined tubes within the fire-box and to place thereon suitably shaped bricks,'the marginal bricks resting on an arch tubeand leaning against the fire-box side sheet in an upwardly inclined position. Due to variations in the width of the space within which the side bricks are placed, the angle of inclina tion will vary and in instances where the inclination is less abrupt there is astrong tendency to force the tube laterally. As this would tend to elongate the tube, it is not unusual to find that leakage occurs at the points of engagement of the tube with the boiler.

One of the objects of. my invention is to provide a construction inwhich this wedging tendency is eliminated entirely or partly, the result being secured by utilizing an. L- shaped side brick, the short arm'of which rests upon an arch tube and abuts an'adjacent intermediate brick and the long arm of which extends horizontally and abuts the side sheet. Any wedging tendency is trans mitted to the body of the arch consisting of so-called middle bricks and of forcing the arch tubes out nated.

The invention will be more readily understood by reference to the accompanying drawing, in which:

Figure 1 is a transverse vertical section through a locomotive fire-box equlpped with an arch constructed in accordance with myinvention; and

Figure 2 is an end elevation of a transverse row of bricks, showing the arch tubes and side sheet in section.

In the drawing it will be seen that the sidesheets of the fire-box are indicated at 10' and the arch tubes, of which four are shown, at 11. The space between adjacent arch tubes is closed by vso-called middle bricks 12, the form of which is well known and. will not be described in detail except t The long arm 15 the point 17 the short brick 12 the possibility of line is elimi- CHARLES EKMTILLER, or crrrcaeo, rtrrivors.

explain that the bricks-areiprovided at their marginal edges with grooves shaped to conform to the periphery of the arch tubes, with the result that :the' bricks are fitted down between the adjacent tubes.

. Thesidej bricks are ofpeculiar construction, being of angular or; L-shape in end elevation. The short arm 13 .is provided with; a longitudinal groove 14, conforming to thecurvature of the outer farc'h tube.

of the brick extends horizontally in a plane above the middle bricks andthe outer end 16 the side sheet 10. It willbe noted that at brick abuts the which may be exerted. by the side brick is transmitted to the adjacent middle brick and is thus distributed over-the entire series of arch tubes.

the vertical major com exerted by the, side terial except howeverin that it is desirable that a horizontal center line through the long arm, 15 should extend above the plane of the intermediate bricks.

and will be governed by the exigencies of each case. I do not therefore, wish to be abuts squarely against arm 13 of the side end of the adjacentmiddle I and'that any wedging tendency.

The long arm 15 is preferably thinned toward its outer end and the V The distance above this plane is more or less immaterial In order to avoid all poslimited except as indicated in'the appended claims.

I claim: 1. In a locomotive arch, the combination with arch tubes and side sheets, of bricks laid upon and closing the space between ad-' and an L-shaped brick having 7 j acent tubes, 7 arms of unequal length the short arm ex tending vertically and resting upon an outside arch tubeand the 'longarm extending v horizontally andv abutting aside sheet. 2. Ina locomotive arch, the combination witharch tubes and side sheets, of bricks laid upon and closing the space between ad jacent tubes, and an L-shaped brick having arms of unequal'length the short arm egg tending vertically and resting upon an" outside arch tube and abutting an intermediate brick and the long arm extending horizontaliy and abutting a side sheet. I V

3. In a' baffle construction, the combination with the side sheets and arch tubes of; fire-box oi bricks supported between adjacent arch tubes, and side bricks of angular fire-box of bricks supported betweem adjacent arch-tubes, and side'bricksof angular form 111 end elevation, one arm thereof extending vertically and provided with a groove in one'margln thereof, said groove be ng formed on a radius greater than that of the arch tube with which the groove cooperates whereby the brick rests upon the top of the the side portion thereof, a portion of.- the body of said short arm resting against the end of an adjacent brick, the long arm" of arch tube without contacting with theside bri'ck extending horizontally" in "a plane above said adjacent brick and contact- 111 131165 side sheet.

igned' at Chicago,

111, this 5th da or February, 1 923 I CHABLE S E. MILLER. 

